The Cisco MCS 7845-H2 Unified Communications Manager Appliance is a high-availability server platform for Cisco Unified Communications Manager and an integral part of a complete, scalable architecture for a new generation of high-quality unified communications solutions for enterprise data networks. It delivers the high performance and availability that today's enterprise networks demand - and it is easy to deploy and highly cost-effective. The server appliance is preinstalled with an operating system and Cisco Unified Communications Manager. It is fully operational upon startup, requiring entry of just a few configuration items such as IP address and domain. At just 2 rack units (2RU) high, the Cisco MCS 7845-H2 offers tremendous power in a low-profile chassis that minimizes rack space.